Recycling used laser cartridges

[Wowee]

We have just moved offices, and have a box of about 16 used toner cartridges. The new office is small so we have no storage space, and want rid. I've looked online, everyone seems to want a minimum of 20 to collect them

Does anyone here recycle them, or know a company who will take 16 off our hands (free)? We are in Nottingham area, could deliver to a convenient location if there is one.

Cheers
Angela